Perhaps you should try some spelling variations:
personal communication » interpersonal communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
der variation » de variation, does variation, die variation
de afrique » de l'afrique, en afrique, l afrique
4 its » 4 it's, 2 its, 4 ito
a le » a les, a la, a l
theorie » theories

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "theorie der variation ((4 its) OR (_ its)) personal communication a le developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation ((4 its) OR (_ its)) personal communication a le developpement de afrique.*.